Printing device



March 15, 1938. w. E. NAYLOR PRINTING DEVICE Filed Dec. 16, 1936 2 Sheets-Sheet l,

FIG.1.

INVENTOR m ATTORNEY March 15, 1938. w, E, NAYLOR 2,111,124

PRINTING DEVICE Filed DeC. 16, 1956 2 Sheets-Sheet 2 INVENTOR TTORNEY Patented Mar. 15, 1938 UNITED STATES ATENT FFECE PRINTING DEVICE Application December 16, 1936, Serial No. 115,063

Claims.

This invention relates to printing mechanisms and more particularly to Vnew and useful improvements in the type of printing mechanism wherein printing is automatically eiected by the :i` insertion of an article to be printed on in printing position.

An object of the invention is to provide a printing mechanism which automatically eiects printing by the insertion in printing position of lo an article to be printed on.

Another object is to provide a printing mech= anism having a movable platen projected against type wheels by electromagnetic means 'and in which a normally open contact in the circuit of the electromagnet is controlled by the article to be printed on.

Still another object is to provide va printing mechanism having an electro'magnet to project the platen against the type wheels-a normally open Contact in the circuit of the electromagnet, a second electromagnet for closing the contact in the circuit of the rst electromagnet, and a second pair of normally open contacts in the circuit of the second electromagnet which is closed by 25 an article to be printed on to effect a printing operation and further provided with a toggle link mechanism normally held in straight line position and connected with the first contact and in which said toggle link is broken from the straight line position by movement of the platen mechanism when printing is eiected, to cause the iirst contact to be open to permit the platen to return to normal position.

Other objects and advantages of this invention will be apparent from the specification and accompanying drawings which show one embodiment of this invention and wherein similar'` reference numerals indicate similar parts and wherein,

In the drawings:

40 Fig. 1 shows a front elevation of the printing mechanism.

Fig. 2 shows an end view of the printing mechanism.

Fig. 3 shows a detail view of part of the printing mechanism control.

Fig. 4 shows awiring diagram of the printing mechanism circuits. Y

Referring now to Fig. 1, a base casing 5 for housing and mounting a movable platen, magnets, and contacts for operating the platen is provided. Mounted above the base may be anyV suitable type elements, such as date type wheels or type wheels for printing hours and minutes, suitably propelled by springs or electric motors as in time stamps or recorders. As the operating mechanism or supporting structure plays no part in the present invention and in order to simplify the illustration 'and description of the invention which resides in the printing mechanisni, such type operating and supporting structure has been omitted and a diagrammatic showing of the type wheels is shown at 6, positioned over a platen l, which is mounted on a plate 8 fixed to alplunjger 9, the lplate 8 resting on a yoke IQ which is mounted on Aa bracket 10 II fastened to posts I2 integral with the base casing. A magnet I3 is mounted inside of the yoke i0 and is provided with a hollow core within which a movable plunger I4 is mounted, said plunger being projectable upon energization of 15 said magnet upwardly to strike the plunger and propel a platen against-, the type wheels adjacent thereto. A p in l5 is fixed to the lower end of the plunger I4 and projects outwardly through an aperture i6 in the yoke I0. A Shield Il is 2'() suitably mounted on whatever supporting structure may be used for carrying the necessary type Wheel mechanism and a table Ila is mounted on the base casing below the shield, leaving sufficient room for a card or other article to be printed 25 upon to be inserted between the shield and table to extend over the platen. A spring member I8 is fastened to the shield and normally holds the article to be printed upon down in the plane of a plunger I9 which is slidably mounted in a 30 bracket 20 and abuts one blade of a Anormally open contact 2|. The entire bracket 20 is not illustrated in order to simplify the understanding of the necessary parts of the invention, but any suitable bracket can be used for mounting 35 the plunger I9 and the contacts 2l and mounted to the base casing 5. The plunger I9 is slidable in the bracket 20 so that when an article to be printed upon is inserted in the front of the machine, which is from the left as viewed in 40 Fig. 2,the edge of the inserted article will strike the plunger I9, moving it to the right and causing it to close contacts 2l.

A lever 22 pivoted at 23 to a bracket 24 which is mounted on a post of the casing extends and traverses the path of movement of the pin I5 and said lever is provided at its opposite end with a pin 25. A. magnet and contact assembly, generally indicated at 26, is mounted on a suitable bracket (not shown) fixed to the base casing and 50 includes a base frame 2l having formed portions 28 integral therewith and having a bracket 2Q mounted thereon. An extending arm .te is mounted to the bracket and has pivotally mounted thereto an armature 3l which cooperates with a 55 Cir pole face 32 of an electromagnet 33. The armature has pivoted thereto at 34 a link 35 which is pivotally connected at 36 to a T-shaped link 3l. One leg of the cross member of the T 38 is formedover to lie in the plane of the link 35 to maintain it in straight line position as shown in Fig. 1 so that the weight of the link does not allow it to drop below this straight line position. The other end of the link 3l is pivoted at 39 to a block 43 which is in turn pivotally mounted at 4I to the bracket 29. A spring 42 is attached to a projection 43 of the bracketZS at one end and to a stud 44 of the link 3l at the other end and biases the block 40 in a clockwise direction, Mounted on the block 40 and insulated therefrom is a T-shaped contact blade 45. Mounted to the bracket 28 and insulated therefrom are two contact blades 46 and 4T in such a position adjacent to the contact blade 45 that they are in the orbit of swing of these contacts about their pivotal mounting 4I. Pin 25 on the end of the lever 22 extends into the plane of the Tshaped lever 31 and as the lever 37 and link 34 are normally in the straight line position, as shown in Fig. l, the armature 3l will be normally biased in a counterclockwise direction about its pivot by means of spring 42. When the magnet 33 is energized, the armature 3i is moved in a clockwise direction and through the straight line linkages 35 and 3l moves the contact block 43 in a counterclockwise direction to close the contact blades 45 and 45, which in turn energize the magnet I3 through a circuit to be explained later, and causes the solenoid plunger I4 to move upwardly to eiect the printing operation and at the same time carrying the pin I5 upwardly to bear against the under surface of the lever 22 and rotate it in a clockwise direction about its pivot 23. The rotation of this lever 22 moves the pin 25 against the lower projecting leg of the T-shaped member 3'! moving it clockwise about its pivot 39 and thus breaking the straight line formation of the two levers 35 and 3T so that a toggle action is eiiected, whereby the biasing action of the spring l2 moves the contact block 4I! in a clockwise direction, permitting the lever 3i now to move to the left While the lever 35 pivots counterclockwise about its pivot 34. The breaking of the contacts 45 and 46 causes the magnet I3 to become deenergized and allows the solenoid plunger i4 and therefore the platen 'l to return to the normal position so that after a printing operation has been effected, the article to be printed on will not be held between the type Wheel and the platen even though the coritact 2| is held closed.

Turning now to the wiring diagram shown in Fig. 4, terminals SS represent a suitable source of electrical supply either from D. C. or A. C. commercial power lines or from a battery supply. The magnets 33 and I3 may be wound to operate on either. An article to be printed on is inserted in the throat 5D (Fig. 2) formed by the table Via and shield II. The leading edge of the article is held down against the table and is thus guided so that the edge meets the left hand end (Fig. 2) of the plunger I9 sliding it to the right in its bracket 23 and causing the contacts 2! to close. These contacts are normally biased in an open position by the spring action of the blade adjacent the plunger. When contact 2I closes a circuit is completed from one side of the supply terminal S (Fig. 4) through wires 5I and 52, contact 2l, now closed, Wire 53, magnet 33, wires 54 and 55 to the other supply terminal S. The energization of magnet 33 causes the armature 3l to be moved against the pole piece 32. The linkages 35 and 31 being in a straight line position as shown in Fig. 1 are normally held in this position by the bias of the spring 44 which also exerts a straight line pull from its anchor members 43 and 44 through the pivot 39. The movement of armature 3I clockwise causes the linkages 35 and 3! to exert a thrust to the right as viewed in Fig. 1 and thereby rocks the block 40 counterclockwise causing the contacts on the T shape blade to impinge upon the contacts on the contact blades 45 and 41 thus providing a conducting path between the two blades and completing a circuit as follows: from supply terminal S, through wires 5I and 56, contacts on blades 46, 45, and 41, now closed, wire 51, magnet I3, wire 55 to the other supply terminal S. Magnet i3 is thus energized and causes its solenoid plunger I 4 to be projected upwards striking the plunger 9 and thereby propelling the platen I upwards against the underside of the article to be printed upon and striking it against the type wheels 6.

When the plunger I4 is projected upward the pin I5 xed thereto is lifted upward beneath the arm 22 raising the end of said arm opposite its pivot 23. arm is raised and engages the lower extension 58 (Fig. 3) of the T-shaped member 3'?, breaking the straight line alignment position as shown in Fig. 1 to cause the member 37 to pivot clockwise about its pivot 33. This permits the spring 42 to move Ymember 3l to the left as viewed in Fig. 3 causing the link 35 to move counterclockwise about its pivot 34 and the block 4I), to rock clockwise about its pivot 4I to take the position as shown in Fig. 3 with the armature 3I still held against the pole piece 32. The rocking of the block 4t causes the contact between contact blade 45 and the contact blades 46 and 4l to become broken to open the circuit through the magnet I3 so that it becomes deenergized and allows the plunger I4 to drop and with it the platen l' and the arm 22. Thus only a single blow is made by the platen upon a single insertion into printing position of an article to be printed upon even though it may be held in position to continue to hold the contact 2l closed.

When the article to be printed upon is withdrawn from printing position contact 2i is opened and magnet 33 is deenergized so that its armature 3l returns to normal position by virtue of the link 35 and member 3l resuming their straight line position as sho-vm in Fig. 1 through both the effect of gravity on the ends pivoted at36 and the pull of the spring 42 of which the anchor pin 44 is aside from the straight line running from the anchor post 43 to the pivot 39 as shown in Fig. 3.

While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modication it will be understood that various omissions and substitutions and changes in the form and details of the device illustrated and in its operation'may be made by those skilled in the art without departing fromV the spirit of the invention. It is the intention, therefore, to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. A printing device for printing on an article including a printing element, an impression device, electromagnetic means for moving said impression device relative to said printing element toV effect a printing operation, means movab-le upon the insertion of said article to be printed The pin 25 fixed to the end of saidupon into printing position, electromagnetic means controlled by said movable means, a normally opened circuit closing element operable by said last named electromagnetic means, a circuit extending from said circuit closing element to said first named electromagnetic means whereby the operation of said circuit closing means to closed position causes said first named electromagnetic means to become energized to eect a printing operation.

2. The invention as set forth in claim l characterized by the provision of means operable upon the operation of said first named electromagnetic means: to cause said circuit closing means to return to its normally open position whereby deenergization of said first named electromagnetic means is effected.

3. A printin-g device including a printing element, an impression device, electromagnetic means for moving said impression device relative to said printing element to effect a printing operation, other electromagnetic means for controlling the operation of said first named electromagnetic means including an electromagnet, a normally opened circuit closer, and means movable upon energization of said electromagnet for closing said circuit closer whereby an operation of said first named electromagnetic means is effected to cause a printing operation.

4. A printing device including a printing element and platen therefor, an electromagnet for moving said platen and element relative to each other to effect a printing operation, a normally open contact device for controlling the operation of said electromagnet and circuits extending from said contacts to said electromagnet, a second electromagnet for eiecting a closing operation of said contacts upon energization of said magnet to cause the energization of said rst named magnet whereby a printing operation is effected, and means operable by said printing operation for causing said contacts to open whereby said rst named electromagnet may become deenergized.

5. A printing device for printing on an article including a printing element and platen therefor, an electromagnet for causing operation of said element and platen relative toeach other upon energization of said electromagnet whereby a printing operation is eiected, normally open contacts and circuits extending from said contacts to said electromagnet whereby energization of said electromagnet is effected upon closure of said contacts, a second electromagnet and an armature therefor, a toggle mechanism normally in straight line position and connected to said armature for controlling the position of said contacts, a second normally open contact movable to closed position by the insertion of an article to be printed upon into printing position, circuits connecting said second named contacts with said second named electromagnet to effect energization of said magnet upon closure of said second named` contacts whereby said first named contacts are closed to eiTect a printing operation by energization of said first named electromagnet, and means operable upon energization of said first named electromagnet for causing said toggle mechanism to break from its straight line position to another position to cause the rst named contacts to resume their normal open position to cause the deenergization of said iirst named magnet.

WILLIAM E. NAYLOR. 

